Our patented CONVERGO® pressure chamber nozzle system is based on the Venturi principle. In addition, aerofoil shaped profiles divide the jet of air into a core jet and a support jet, and then bring it back together again. A fillet on the outer nozzle profile diverts the unwanted proportions of outdoor air, while the “soft” edge on the inside of the nozzle profile brings about the desired induction of room air into the air curtain.
The result is a strongly directed jet of air that enables high and wide doors to be screened using little energy.